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RE: XML Schema and the Unique Particle Attribution (UPA) rule

  • From: "Klotz, Leigh" <Leigh.Klotz@x...>
  • To: "Azariah Jeyakumar" <ajeyakumar@t...>, <xml-dev@l...>
  • Date: Fri, 10 Aug 2007 14:38:36 -0700

RE:  XML Schema and the Unique Particle Attribution (UPA) rule
Or use RNG ;-)
 
http://books.xmlschemata.org/relaxng/relax-CHP-7-SECT-2.html [Erik van der Vlist, why you should]
http://www.simonstl.com/articles/sanity/relaxngSchema.html [Simon St. Laurent, why you can't]
http://www.xml.com/pub/a/2004/02/11/relaxtron.html [Eddie Robertsson, what it doesn't do]
 
Leigh.
 


From: Michael Kay [mailto:mike@s...]
Sent: Friday, August 10, 2007 2:32 PM
To: 'Azariah Jeyakumar'; xml-dev@l...
Subject: RE: XML Schema and the Unique Particle Attribution (UPA) rule

This is a feature often requested in XML Schema called "cooccurrence constraints". It can't be done in XML Schema 1.0, unless you are prepared to change your <type> element into an xsi:type attribute. It will be possible in XML Schema 1.1, but that's still in the future.
 
Michael Kay
http://www.saxonica.com/
 
...


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